We report a large enhancement of thermally injected spin current in normal metal (NM)/antiferromagnet (AF)/yttrium iron garnet (YIG), where a thin AF insulating layer of NiO or CoO can enhance the spin current from YIG to a NM by up to a factor of 10. The spin current enhancement in NM/AF/YIG, with a pronounced maximum near the Neel temperature of the thin AF layer, has been found to scale linearly with the spin-mixing conductance at the NM/YIG interface for NM = 3d, 4d, and 5d metals. Calculations of spin current enhancement and spin mixing conductance are qualitatively consistent with the experimental results.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/614754 |
| Date | 05 May 2016 |
| Creators | Lin, Weiwei, Chen, Kai, Zhang, Shufeng, Chien, C. L. |
| Contributors | Univ Arizona, Dept Phys |
| Publisher | AMER PHYSICAL SOC |
| Source Sets | University of Arizona |
| Language | English |
| Detected Language | English |
| Type | Article |
| Rights | © 2016 American Physical Society |
| Relation | http://link.aps.org/doi/10.1103/PhysRevLett.116.186601 |
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